Safety door fastener



June 18, 1929. M. DORION 1,717,964

SAFETY DOOR FASTENER FilPd Aug 11, 1927 Inwentar Attorney Patented June18, 1929.

eAr 'Nr orricsi .li'fICHAEIl'i DORION, 0F RUMFORD, MAINE.

SAFETY DOOR FASTENER.

Application filed August 11, 1927'. Serial No. 212,305.

This invention relates to new and useful improvements in fasteningdevices and aims to provide a highly novel, simple and efficient doorfastener wherein swinging doors may be positively fastened from theinside other than through the agency of the usual key lock associatedwith practically all types of swinging doors. l urthermore, theconstruction of this particular fastener is such that it will be impossible to release the same from the outside with. the obvious resultthat the door cannot be opened from the outside even though the usuallocks or latching devices associated with the doors may be effectivelyreleased.

The invention further aims to provide a fastening device that may beeasily applied or that may be readily released when it is desired toopen the door from the inside, and that will not to any marked degreemar or otherwise injure the door or door jamb.

In the drawing wherein like references indicate corresponding partsthroughout the several views thereof:

Figure 1 is a horizontal fragmentary section through the free edge of aswinging door and its adjacent jamb structure disclosing my safetyfastener as applied, the dotted lines representing the position ofcertain structural elements when applying or releasing the fastener.

Figure 2 is an elevation of one side of the fastener, and

Figure 3 is a detail horizontalsection there through.

Now having particular reference to the drawing, A designatesfragmentarily a conventional si'vinging door, while B designates thatparticular portion of the door jambadjacent the free edge of the door,which jamb is provided with the usual door latch bolt socket 6 arrangedupon the outer'side of which is the usual metallic plate a. My inventionper se consists of a pair of narrow metallic plates 5 and 6 ofpredetermined length that r are hingedly connected adjacent theiropposite edges by suitable hinges 7 7 At their inner ends these plates 5and 6 are longitudinally slot-ted so as to provide an elongated slot 8when the plates 5 and 6 have been arranged in longitudinal alinement asdisclosed in th several views.

The forward end of the plate 5 is provided with a laterally extendingbeveled head 9 provided for engagement within the latch bolt socket b ofthe door jamb B as clearly in dicated in Figure 1. The opposite surfaceof this plate 5 is formed with transversely extending teeth 10 Whileslidably arranged upon this surface of said plate 5 is a metallic plate11, the inner face of which is also formed with teeth for mesh with theteeth of the plate 5 as more clearly disclosed in Figure 1. The innersurface of said plate 11 is formed centrally with a lug 12 for slidingengagement within the slot 8 of said plates 5 and 6 so as to prevent theturning of said plate 11 with respect to either of said plates 5 or 6.Furthern'iore, the inner end of the plate 11 is formed with a lateralextension 13 for abutting engagement with the inner side of the door Aafter the same has been swung to the closed position, as indicated inFigure 1.

In hack of the lug 12 said plate 11 is formed with an opening throughwhich is arranged a screw 1 1 while threaded upon the inner threaded end'of this screw is a thumb nut 15 that when screwed inwardly upon thescrew will bear against the plate 11 to firmly bind the same upon theplate 10 to prevent. longitudinal sliding movement of the plate 11 withrespect to said plate 5. How ever, after the device has been applied asindicated by the full lines in Figure 1 in which position the door A isfirmly fastened, the device may be easily removed by releasing the screw15 and thence sliding the plate 11 rearwardly on the hinged plate 6,whereupon said hinged plate may be swung inwardly as indicated by thedotted lines in Figure 1 for removing the headed end of the plate 11from the door A whereupon said door may be opened. in the usual mannerand the device removed.

In view of the foregoing description when considered in conjunction withthe accompanying drawing it. will at once be apparent that I haveprovided a highly novel, simple, and extremely efficient safety fastenerfor swinging doors that is well adapted for all the purposes heretoforedesignated even though I have herein shown and described. the inventionas consisting of certain detail structural elements it is neverthelessto be understood that some changes may be made therein without affectingthe spirit and scope of the appended claim.

Having thus described the invention, what I claim as new and desire tosecure by Letters Patent is In a safety door fastener of the characterdescribed, a pair of late members, a hinge connection between Elie adjaoent ends of the the free edge of the door when the same is closed, andmeans engageable through said 1 sliding plate and through the slot insaid hinged plate whereby said plate may be secured to either of saidplates.

In testimony whereof I aflix my signature.

MICHAEL DORION.

